One-handed hypodermic syringe

ABSTRACT

The present invention relates to a one-handed hypodermic syringe comprising the renovated structure that allows users to push and pull the syringe by one hand. The medical personnel may place their thumbs inside the ring disposed in the distal end of the plunger, and press the concave objects disposed in the distal end of the barrel by their index fingers and middle fingers, thereby hold the syringe steadily and manipulate pull-push action of the injection with one hand. The present invention is designed to enhance the convenience for the medical personnel&#39;s use of hypodermic syringe.

BACKGROUND OF THE INVENTION

[0001] 1. Field of the Invention

[0002] The present invention relates to a one-handed hypodermic syringe comprising two concave objects opposite to each other on the rear portion of the syringe as well as a ring with a broken slit on the distal portion of the plunger of the syringe. The medical personnel can hold the ring steadily with their thumbs, and the syringe with their index fingers and middle fingers, to manipulate the pull-push action of the injection.

[0003] Secondly, the present invention consists of a blocking-object inside the distal end of the syringe to prevent the plunger from moving out of the barrel chamber, thereby keep the syringe needle inside the syringe in consideration of safety.

[0004] Thirdly, there is a slit near the distal end of the plunger. In the event the medical personnel pull the plunger with excessive force, their thumbs can be released from the slit so as to prevent the plunger from falling out of the syringe and keep the needle inside the syringe barrel for safety consideration.

[0005] 2. Description of the Prior Art

[0006] The present invention relates to a one-handed hypodermic syringe designed to improve the performance of conventional syringes and the safety syringes.

SUMMARY OF THE INVENTION

[0007] The conventional syringes are subject to the restrictions as follows:

[0008] 1. Users need to keep the syringe needles facing upward and pull the plunger outward slightly before the injection, then push the plunger inward so as to remove the air out of the syringe. This motion requires two hands.

[0009] 2. To use the syringes equipped with the safety needle, users have to pull the plunger outward after the injection in order to force the syringe needle to return to its original position inside the barrel. Two hands are required in this motion, too.

[0010] Apparently, medical personnel always need to use two hands for the injection. However, the medical personnel have to use one hand occasionally. Therefore, both medical personnel and patients face a certain level of risks.

[0011] In an effort to upgrade the performance of the hypodermic syringes, the inventor has studied the structure of syringe thoroughly so as to allow the medical personnel using the syringes with one hand only.

[0012] The present invention will be apparent in its contents of technique after reading the detailed description of the preferred embodiments of the present invention in reference to the accompanying drawings, wherein:

BRIEF DESCRIPTION OF THE DRAWINGS

[0013]FIG. 1 is a stereoscopic drawing of present invention;

[0014]FIG. 2 is a sectional view of the present invention;

[0015]FIG. 3 is another sectional view of the present invention;

[0016]FIG. 4 is a drawing showing the motion of the present invention;

[0017]FIG. 5 is another drawing showing the motion of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

[0018] As shown by FIG. 1, FIG. 2, and FIG. 3, the syringe 1 consists of a barrel 2, syringe needle 3, and plunger 4. The syringe needle 3 is disposed in the front area of the barrel 2, and the plunger 4 is disposed inside the barrel 2.

[0019] There are two concave objects 21 disposed in the distal portion of the barrel 2 opposite to each other. Users may press the concave objects 21 with their fingers;

[0020] There is a ring 41 disposed in the distal end of the plunger 4. The ring 41 accommodates users' thumbs 51.

[0021] As shown by FIG. 4, the medical personnel can place their thumbs 51 through the ring 41, their index fingers 52 and middle fingers 53 hold the concave objects 21 of the barrel 2 at the same time, so they can hold the syringe 1 steadily and push and pull the plunger 4 with one hand.

[0022] To prevent the plunger 4 from moving out of the barrel 2 due to user's excessive force pulling the plunger 4, a broken slit 23 is disposed in the distal end of the barrel 2. There is a stopper 22 disposed inside the broken slit 23 through the barrel 2. The stopper 22 presses the stuffing object 42 of the plunger 4 to prevent the plunger 4 from falling out of the barrel 2.

[0023] There is an slit 411 disposed in the ring 41 at the distal end of the plunger 4. In the event the thumb 51 presses the plunger 4 with excessive force, the thumb 51 falls out of the slit 411 as shown by FIG. 5 to prevent the plunger 4 from moving out of the barrel 2, thereby keep the syringe needle 3 inside the barrel for safety purpose.

[0024] The present invention can be installed in the conventional syringe. When installed in the safety syringe, the advantages of the present invention become more apparent.

[0025] Having thus described the invention, what the inventor hereby claims as new and desires to be secured by US Patent & Trademark Office includes: 

1. A one-handed hypodermic syringe consists of a barrel, syringe needle, and plunger. The syringe needle is disposed in the front end of the barrel, and the plunger inside the barrel. Wherein: the concave objects are disposed in the distal end of the barrel opposite to each other to accommodate users' fingers pressing the barrel; a ring is disposed in the distal end of the plunger to allow users placing their fingers inside it.
 2. A one-handed hypodermic syringe as stated in claim 1, wherein, broken slit is disposed in the distal end of the barrel. There is a stopper inside the hole to block the stuffing object of the plunger and prevent the plunger from falling out of the barrel.
 3. A one-handed hypodermic syringe as stated in claim 1, wherein, a slit is disposed in the distal end of the plunger.
 4. A one-handed hypodermic syringe as stated in claim 1, the syringe needle is a retrievable safety needle. 